﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Example07_CSharp
{
    class Polygon
    {
        protected
            int width,height;
            public
                Polygon(int a)
            {
                width = a;
            }
            public
                void setvalues(int a, int b)
            {
                width = a;
                height = b;
            }
    }
    class Rectangle : Polygon
    {
        public Rectangle(int w, int h)
            : base(w)
        {
            height = h;
        }
        public int area()
        {
            return (width *height);
        }
    }
    class Program
    {
        static void Main(string[] args)
        {
            Rectangle rect = new Rectangle(8,9);
            Console.WriteLine("rect:{0}", rect.area());
        }
    }
}
